Desk lamp



FIG. 1 is a front perspective view of a desk lamp;

FIG. 2 is a rear perspective view of the desk lamp;

FIG. 3 is a front elevation view of the desk lamp;

FIG. 4 is a rear elevation view of the desk lamp;

FIG. 5 is a first side elevation view of the desk lamp;

FIG. 6 is a second side elevation view of the desk lamp;

FIG. 7 is a top plan view of the desk lamp; and,

FIG. 8 is a bottom plan view of the desk lamp.

The broken lines as shown in the drawings show portions of the desk lamp that form no part of the claimed design. 

CLAIM The ornamental design for a desk lamp, as shown and described. 